INFO: task syz-executor.1:10225 can't die for more than 143 seconds. syz-executor.1 R running task 24360 10225 9370 0x00004006 Call Trace: context_switch kernel/sched/core.c:2818 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3444 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:3692 INFO: task syz-executor.1:10278 can't die for more than 144 seconds. syz-executor.1 R running task 27160 10278 9370 0x00004006 Call Trace: context_switch kernel/sched/core.c:2818 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3444 INFO: task syz-executor.5:10227 can't die for more than 144 seconds. syz-executor.5 R running task 24216 10227 9383 0x00004006 Call Trace: context_switch kernel/sched/core.c:2818 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3444 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:3692 retint_kernel+0x1b/0x2b INFO: task syz-executor.5:10275 can't die for more than 145 seconds. syz-executor.5 R running task 27888 10275 9383 0x00004006 Call Trace: context_switch kernel/sched/core.c:2818 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3444 Showing all locks held in the system: 1 lock held by khungtaskd/1045: #0: 00000000eac2e751 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5262 1 lock held by rsyslogd/9239: #0: 000000007b3c8eb3 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/9328: #0: 000000005c1af663 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e7848fb2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9329: #0: 0000000036145d3b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000005f2d39fe (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9330: #0: 000000003a7404b4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000226a4738 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9331: #0: 00000000af5db946 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000039742655 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9332: #0: 000000006f306dca (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000018adfd76 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9333: #0: 00000000d7863351 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000c898c73c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9334: #0: 00000000222a2454 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000046409b7f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.1/10278: 1 lock held by syz-executor.5/10275: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1045 Comm: khungtaskd Not tainted 5.2.0-rc5-next-20190621 #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x22f/0x27f lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:249 [inline] watchdog+0xc54/0x1320 kernel/hung_task.c:333 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10278 Comm: syz-executor.1 Not tainted 5.2.0-rc5-next-20190621 #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:write_comp_data+0x0/0x70 kernel/kcov.c:122 Code: 83 fa 02 75 20 48 8b 88 f8 12 00 00 8b 80 f4 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 <65> 4c 8b 04 25 c0 fd 01 00 65 8b 05 98 b5 90 7e a9 00 01 1f 00 75 RSP: 0018:ffff8880579972c8 EFLAGS: 00000202 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffffff8623163e RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff8880579972d0 R08: ffff888058434280 R09: fffffbfff149f354 R10: fffffbfff149f353 R11: ffffffff8a4f9a9f R12: 0000000000000003 R13: 0000000000000000 R14: 000000000000000a R15: 0000000000000000 FS: 00007f726104c700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000911da000 CR4: 00000000001406e0 Call Trace: __read_seqcount_begin include/linux/seqlock.h:114 [inline] raw_read_seqcount_begin include/linux/seqlock.h:148 [inline] read_seqcount_begin include/linux/seqlock.h:165 [inline] xfrm_state_find+0x195e/0x5040 net/xfrm/xfrm_state.c:1054 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2390 [inline] xfrm_tmpl_resolve+0x32a/0xc90 net/xfrm/xfrm_policy.c:2435 xfrm_resolve_and_create_bundle+0x137/0x2680 net/xfrm/xfrm_policy.c:2726 xfrm_lookup_with_ifid+0x278/0x1fc0 net/xfrm/xfrm_policy.c:3049 xfrm_lookup net/xfrm/xfrm_policy.c:3173 [inline] xfrm_lookup_route+0x3b/0x1f0 net/xfrm/xfrm_policy.c:3184 ip6_dst_lookup_flow+0x189/0x220 net/ipv6/ip6_output.c:1156 ip6_datagram_dst_update+0x5d8/0xc20 net/ipv6/datagram.c:87 __ip6_datagram_connect+0x5e9/0x1390 net/ipv6/datagram.c:246 ip6_datagram_connect+0x30/0x50 net/ipv6/datagram.c:269 ip6_datagram_connect_v6_only+0x69/0x90 net/ipv6/datagram.c:281 inet_dgram_connect+0x14a/0x2d0 net/ipv4/af_inet.c:571 __sys_connect+0x264/0x330 net/socket.c:1834 __do_sys_connect net/socket.c:1845 [inline] __se_sys_connect net/socket.c:1842 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1842 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f726104bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004592c9 RDX: 000000000000001c RSI: 0000000020000200 RDI: 0000000000000006 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f726104c6d4 R13: 00000000004bf7b5 R14: 00000000004d0f38 R15: 00000000ffffffff